text: Here's a slightly more efficient / easier method. Type it with the cursor at the beginning of the line of text (i.e. LOAD) that you want to center.
  
  
  :center 80&lt;cr&gt;: center the text with Vim's built in function
  hhv0r#: add the #s on the left
  A&lt;space&gt;&lt;esc&gt;40A#&lt;esc&gt;: add plenty of #s on the right
  d80|: delete excess #s on the right
  YppVr#kk.: add top and bottom #s
  
  
  So, the full command:
  
  :center 80&lt;cr&gt;hhv0r#A&lt;space&gt;&lt;esc&gt;40A#&lt;esc&gt;d80&lt;bar&gt;YppVr#kk.
  
  
  You could put something like this in your .vimrc in order to add a convenient mapping:
  
  nnoremap &lt;C-b&gt; :center 80&lt;cr&gt;hhv0r#A&lt;space&gt;&lt;esc&gt;40A#&lt;esc&gt;d80&lt;bar&gt;YppVr#kk.
  
  
  Mini-screencast demonstration: